Fireflies for my burning earth
You should either define a vertex group on your sphere and change the particle settings (also for your fire and smoke) to limit emission to that vertex group or, seeing that you seem to be using this sphere for nothing else, simply delete the parts of the mesh that should not emit particles or smoke.

Quick explanation of vertex group approach:


Select your mesh, 
go into Edit mode, 
then select the vertices/faces that you want to emit particles/smoke, 
then go to the object data tab and create a new vertex group by clicking the "+"-button in that area. You should give the  group a meaningful name. 
Then click the "Assign"-button beneath the list of vertex groups while your new group is selected and the selected vertices will be assigned to that group with a weight of 1.0. 
Next, go to the particle settings under Vertex Groups and select your new group for the Density setting.
For smoke, look at the Smoke Flow Advanced section of the emitter object's smoke settings. You can select the vertex group there.